Crossing the Land

The map below shows the route of the Oregon Trail. Notice that the map shows present-day states. At the time of Lucy's journey, some of this land was not yet organized into states. Use the map to answer the following questions.
About how many miles long was the Oregon Trail?

If the wagon trains averaged 15 miles a day, about how many days did it take to complete the trip?

What present-day states did the trail cross?

What present-day state had the travelers reached when they had traveled half of the trail?